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900d495a AO |
1 | /* |
2 | * cdc_ncm.c | |
3 | * | |
c84ff1d6 | 4 | * Copyright (C) ST-Ericsson 2010-2012 |
900d495a AO |
5 | * Contact: Alexey Orishko <alexey.orishko@stericsson.com> |
6 | * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com> | |
7 | * | |
8 | * USB Host Driver for Network Control Model (NCM) | |
9 | * http://www.usb.org/developers/devclass_docs/NCM10.zip | |
10 | * | |
11 | * The NCM encoding, decoding and initialization logic | |
12 | * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h | |
13 | * | |
14 | * This software is available to you under a choice of one of two | |
15 | * licenses. You may choose this file to be licensed under the terms | |
16 | * of the GNU General Public License (GPL) Version 2 or the 2-clause | |
17 | * BSD license listed below: | |
18 | * | |
19 | * Redistribution and use in source and binary forms, with or without | |
20 | * modification, are permitted provided that the following conditions | |
21 | * are met: | |
22 | * 1. Redistributions of source code must retain the above copyright | |
23 | * notice, this list of conditions and the following disclaimer. | |
24 | * 2. Redistributions in binary form must reproduce the above copyright | |
25 | * notice, this list of conditions and the following disclaimer in the | |
26 | * documentation and/or other materials provided with the distribution. | |
27 | * | |
28 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
29 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
32 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
37 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
38 | * SUCH DAMAGE. | |
39 | */ | |
40 | ||
41 | #include <linux/module.h> | |
900d495a AO |
42 | #include <linux/netdevice.h> |
43 | #include <linux/ctype.h> | |
44 | #include <linux/ethtool.h> | |
45 | #include <linux/workqueue.h> | |
46 | #include <linux/mii.h> | |
47 | #include <linux/crc32.h> | |
48 | #include <linux/usb.h> | |
c84ff1d6 | 49 | #include <linux/hrtimer.h> |
900d495a AO |
50 | #include <linux/atomic.h> |
51 | #include <linux/usb/usbnet.h> | |
52 | #include <linux/usb/cdc.h> | |
c91ce3b6 | 53 | #include <linux/usb/cdc_ncm.h> |
900d495a | 54 | |
1e8bbe6c BM |
55 | #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) |
56 | static bool prefer_mbim = true; | |
57 | #else | |
58 | static bool prefer_mbim; | |
59 | #endif | |
60 | module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); | |
61 | MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); | |
62 | ||
c84ff1d6 AO |
63 | static void cdc_ncm_txpath_bh(unsigned long param); |
64 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); | |
65 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); | |
900d495a | 66 | static struct usb_driver cdc_ncm_driver; |
900d495a | 67 | |
5aa73d5d BM |
68 | /* handle rx_max and tx_max changes */ |
69 | static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) | |
70 | { | |
71 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
72 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
73 | u32 val, max, min; | |
74 | ||
75 | /* clamp new_rx to sane values */ | |
76 | min = USB_CDC_NCM_NTB_MIN_IN_SIZE; | |
77 | max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); | |
78 | ||
79 | /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ | |
80 | if (max < min) { | |
81 | dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", | |
82 | le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); | |
83 | max = min; | |
84 | } | |
85 | ||
86 | val = clamp_t(u32, new_rx, min, max); | |
87 | if (val != new_rx) { | |
88 | dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range. Using %u\n", | |
89 | min, max, val); | |
90 | } | |
91 | ||
92 | /* inform device about NTB input size changes */ | |
93 | if (val != ctx->rx_max) { | |
94 | __le32 dwNtbInMaxSize = cpu_to_le32(val); | |
95 | ||
96 | dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); | |
97 | if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, | |
98 | USB_TYPE_CLASS | USB_DIR_OUT | |
99 | | USB_RECIP_INTERFACE, | |
100 | 0, iface_no, &dwNtbInMaxSize, 4) < 0) | |
101 | dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); | |
102 | else | |
103 | ctx->rx_max = val; | |
104 | } | |
105 | ||
106 | /* clamp new_tx to sane values */ | |
107 | min = CDC_NCM_MIN_HDR_SIZE + ctx->max_datagram_size; | |
108 | max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); | |
109 | ||
110 | /* some devices set dwNtbOutMaxSize too low for the above default */ | |
111 | min = min(min, max); | |
112 | ||
113 | val = clamp_t(u32, new_tx, min, max); | |
114 | if (val != new_tx) { | |
115 | dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range. Using %u\n", | |
116 | min, max, val); | |
117 | } | |
118 | if (val != ctx->tx_max) | |
119 | dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); | |
120 | ctx->tx_max = val; | |
121 | } | |
122 | ||
f8afb73d BM |
123 | /* helpers for NCM and MBIM differences */ |
124 | static u8 cdc_ncm_flags(struct usbnet *dev) | |
900d495a | 125 | { |
bed6f762 | 126 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
900d495a | 127 | |
f8afb73d BM |
128 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) |
129 | return ctx->mbim_desc->bmNetworkCapabilities; | |
130 | if (ctx->func_desc) | |
131 | return ctx->func_desc->bmNetworkCapabilities; | |
132 | return 0; | |
133 | } | |
134 | ||
135 | static int cdc_ncm_eth_hlen(struct usbnet *dev) | |
136 | { | |
137 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
138 | return 0; | |
139 | return ETH_HLEN; | |
140 | } | |
141 | ||
142 | static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) | |
143 | { | |
144 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
145 | return CDC_MBIM_MIN_DATAGRAM_SIZE; | |
146 | return CDC_NCM_MIN_DATAGRAM_SIZE; | |
147 | } | |
148 | ||
149 | static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) | |
150 | { | |
151 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
152 | ||
153 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) | |
154 | return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); | |
155 | if (ctx->ether_desc) | |
156 | return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
157 | return CDC_NCM_MAX_DATAGRAM_SIZE; | |
158 | } | |
159 | ||
160 | /* initial one-time device setup. MUST be called with the data interface | |
161 | * in altsetting 0 | |
162 | */ | |
163 | static int cdc_ncm_init(struct usbnet *dev) | |
164 | { | |
165 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
166 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
167 | int err; | |
900d495a | 168 | |
90b8b037 ML |
169 | err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, |
170 | USB_TYPE_CLASS | USB_DIR_IN | |
171 | |USB_RECIP_INTERFACE, | |
ff0992e9 BM |
172 | 0, iface_no, &ctx->ncm_parm, |
173 | sizeof(ctx->ncm_parm)); | |
36c35416 | 174 | if (err < 0) { |
59ede316 BM |
175 | dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); |
176 | return err; /* GET_NTB_PARAMETERS is required */ | |
900d495a AO |
177 | } |
178 | ||
f8afb73d BM |
179 | /* set CRC Mode */ |
180 | if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { | |
181 | dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); | |
182 | err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, | |
183 | USB_TYPE_CLASS | USB_DIR_OUT | |
184 | | USB_RECIP_INTERFACE, | |
185 | USB_CDC_NCM_CRC_NOT_APPENDED, | |
186 | iface_no, NULL, 0); | |
187 | if (err < 0) | |
188 | dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); | |
189 | } | |
190 | ||
191 | /* set NTB format, if both formats are supported. | |
192 | * | |
193 | * "The host shall only send this command while the NCM Data | |
194 | * Interface is in alternate setting 0." | |
195 | */ | |
196 | if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & USB_CDC_NCM_NTH32_SIGN) { | |
197 | dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); | |
198 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, | |
199 | USB_TYPE_CLASS | USB_DIR_OUT | |
200 | | USB_RECIP_INTERFACE, | |
201 | USB_CDC_NCM_NTB16_FORMAT, | |
202 | iface_no, NULL, 0); | |
203 | if (err < 0) | |
204 | dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); | |
205 | } | |
206 | ||
207 | /* set initial device values */ | |
ff0992e9 BM |
208 | ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); |
209 | ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); | |
210 | ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); | |
211 | ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); | |
212 | ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); | |
84e77a8b | 213 | /* devices prior to NCM Errata shall set this field to zero */ |
ff0992e9 | 214 | ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); |
47175e5f | 215 | |
ae223cd4 BM |
216 | dev_dbg(&dev->intf->dev, |
217 | "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", | |
218 | ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, | |
f8afb73d | 219 | ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); |
900d495a | 220 | |
84e77a8b AO |
221 | /* max count of tx datagrams */ |
222 | if ((ctx->tx_max_datagrams == 0) || | |
223 | (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) | |
224 | ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; | |
900d495a | 225 | |
f8afb73d BM |
226 | return 0; |
227 | } | |
228 | ||
229 | /* set a new max datagram size */ | |
230 | static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) | |
231 | { | |
232 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
233 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
234 | __le16 max_datagram_size; | |
235 | u16 mbim_mtu; | |
236 | int err; | |
237 | ||
238 | /* set default based on descriptors */ | |
239 | ctx->max_datagram_size = clamp_t(u32, new_size, | |
240 | cdc_ncm_min_dgram_size(dev), | |
241 | CDC_NCM_MAX_DATAGRAM_SIZE); | |
242 | ||
243 | /* inform the device about the selected Max Datagram Size? */ | |
244 | if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) | |
245 | goto out; | |
246 | ||
247 | /* read current mtu value from device */ | |
248 | err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, | |
249 | USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, | |
250 | 0, iface_no, &max_datagram_size, 2); | |
251 | if (err < 0) { | |
252 | dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); | |
253 | goto out; | |
254 | } | |
255 | ||
256 | if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) | |
257 | goto out; | |
258 | ||
259 | max_datagram_size = cpu_to_le16(ctx->max_datagram_size); | |
260 | err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, | |
261 | USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
262 | 0, iface_no, &max_datagram_size, 2); | |
263 | if (err < 0) | |
264 | dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); | |
265 | ||
266 | out: | |
267 | /* set MTU to max supported by the device if necessary */ | |
268 | dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); | |
269 | ||
270 | /* do not exceed operater preferred MTU */ | |
271 | if (ctx->mbim_extended_desc) { | |
272 | mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); | |
273 | if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) | |
274 | dev->net->mtu = mbim_mtu; | |
275 | } | |
276 | } | |
277 | ||
278 | static void cdc_ncm_fix_modulus(struct usbnet *dev) | |
279 | { | |
280 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
281 | u32 val; | |
900d495a AO |
282 | |
283 | /* | |
284 | * verify that the structure alignment is: | |
285 | * - power of two | |
286 | * - not greater than the maximum transmit length | |
287 | * - not less than four bytes | |
288 | */ | |
289 | val = ctx->tx_ndp_modulus; | |
290 | ||
291 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
292 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 293 | dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); |
900d495a AO |
294 | ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
295 | } | |
296 | ||
297 | /* | |
298 | * verify that the payload alignment is: | |
299 | * - power of two | |
300 | * - not greater than the maximum transmit length | |
301 | * - not less than four bytes | |
302 | */ | |
303 | val = ctx->tx_modulus; | |
304 | ||
305 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
306 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 307 | dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); |
900d495a AO |
308 | ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
309 | } | |
310 | ||
311 | /* verify the payload remainder */ | |
312 | if (ctx->tx_remainder >= ctx->tx_modulus) { | |
ae223cd4 | 313 | dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); |
900d495a AO |
314 | ctx->tx_remainder = 0; |
315 | } | |
316 | ||
317 | /* adjust TX-remainder according to NCM specification. */ | |
f8afb73d | 318 | ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & |
2d1c4310 | 319 | (ctx->tx_modulus - 1)); |
f8afb73d | 320 | } |
900d495a | 321 | |
f8afb73d BM |
322 | static int cdc_ncm_setup(struct usbnet *dev) |
323 | { | |
324 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a | 325 | |
f8afb73d BM |
326 | /* initialize basic device settings */ |
327 | cdc_ncm_init(dev); | |
47175e5f | 328 | |
f8afb73d BM |
329 | /* clamp rx_max and tx_max and inform device */ |
330 | cdc_ncm_update_rxtx_max(dev, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), | |
331 | le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); | |
259fef03 | 332 | |
f8afb73d BM |
333 | /* sanitize the modulus and remainder values */ |
334 | cdc_ncm_fix_modulus(dev); | |
259fef03 | 335 | |
f8afb73d BM |
336 | /* set max datagram size */ |
337 | cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); | |
900d495a AO |
338 | return 0; |
339 | } | |
340 | ||
341 | static void | |
ff1632aa | 342 | cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) |
900d495a | 343 | { |
ff1632aa | 344 | struct usb_host_endpoint *e, *in = NULL, *out = NULL; |
900d495a AO |
345 | u8 ep; |
346 | ||
347 | for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { | |
348 | ||
349 | e = intf->cur_altsetting->endpoint + ep; | |
350 | switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
351 | case USB_ENDPOINT_XFER_INT: | |
352 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
353 | if (!dev->status) |
354 | dev->status = e; | |
900d495a AO |
355 | } |
356 | break; | |
357 | ||
358 | case USB_ENDPOINT_XFER_BULK: | |
359 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
360 | if (!in) |
361 | in = e; | |
900d495a | 362 | } else { |
ff1632aa BM |
363 | if (!out) |
364 | out = e; | |
900d495a AO |
365 | } |
366 | break; | |
367 | ||
368 | default: | |
369 | break; | |
370 | } | |
371 | } | |
ff1632aa BM |
372 | if (in && !dev->in) |
373 | dev->in = usb_rcvbulkpipe(dev->udev, | |
374 | in->desc.bEndpointAddress & | |
375 | USB_ENDPOINT_NUMBER_MASK); | |
376 | if (out && !dev->out) | |
377 | dev->out = usb_sndbulkpipe(dev->udev, | |
378 | out->desc.bEndpointAddress & | |
379 | USB_ENDPOINT_NUMBER_MASK); | |
900d495a AO |
380 | } |
381 | ||
382 | static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) | |
383 | { | |
384 | if (ctx == NULL) | |
385 | return; | |
386 | ||
900d495a AO |
387 | if (ctx->tx_rem_skb != NULL) { |
388 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
389 | ctx->tx_rem_skb = NULL; | |
390 | } | |
391 | ||
392 | if (ctx->tx_curr_skb != NULL) { | |
393 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
394 | ctx->tx_curr_skb = NULL; | |
395 | } | |
396 | ||
397 | kfree(ctx); | |
398 | } | |
399 | ||
c91ce3b6 | 400 | int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) |
900d495a | 401 | { |
83292236 | 402 | const struct usb_cdc_union_desc *union_desc = NULL; |
900d495a AO |
403 | struct cdc_ncm_ctx *ctx; |
404 | struct usb_driver *driver; | |
405 | u8 *buf; | |
406 | int len; | |
407 | int temp; | |
408 | u8 iface_no; | |
409 | ||
c796984f | 410 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
8f0923c1 DN |
411 | if (!ctx) |
412 | return -ENOMEM; | |
900d495a | 413 | |
c84ff1d6 AO |
414 | hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
415 | ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; | |
bed6f762 | 416 | ctx->bh.data = (unsigned long)dev; |
c84ff1d6 AO |
417 | ctx->bh.func = cdc_ncm_txpath_bh; |
418 | atomic_set(&ctx->stop, 0); | |
900d495a | 419 | spin_lock_init(&ctx->mtx); |
900d495a AO |
420 | |
421 | /* store ctx pointer in device data field */ | |
422 | dev->data[0] = (unsigned long)ctx; | |
423 | ||
9fe0234c BM |
424 | /* only the control interface can be successfully probed */ |
425 | ctx->control = intf; | |
426 | ||
900d495a AO |
427 | /* get some pointers */ |
428 | driver = driver_of(intf); | |
429 | buf = intf->cur_altsetting->extra; | |
430 | len = intf->cur_altsetting->extralen; | |
431 | ||
900d495a AO |
432 | /* parse through descriptors associated with control interface */ |
433 | while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { | |
434 | ||
435 | if (buf[1] != USB_DT_CS_INTERFACE) | |
436 | goto advance; | |
437 | ||
438 | switch (buf[2]) { | |
439 | case USB_CDC_UNION_TYPE: | |
83292236 | 440 | if (buf[0] < sizeof(*union_desc)) |
900d495a AO |
441 | break; |
442 | ||
83292236 | 443 | union_desc = (const struct usb_cdc_union_desc *)buf; |
9fe0234c BM |
444 | /* the master must be the interface we are probing */ |
445 | if (intf->cur_altsetting->desc.bInterfaceNumber != | |
296e81f8 BM |
446 | union_desc->bMasterInterface0) { |
447 | dev_dbg(&intf->dev, "bogus CDC Union\n"); | |
9fe0234c | 448 | goto error; |
296e81f8 | 449 | } |
900d495a | 450 | ctx->data = usb_ifnum_to_if(dev->udev, |
83292236 | 451 | union_desc->bSlaveInterface0); |
900d495a AO |
452 | break; |
453 | ||
454 | case USB_CDC_ETHERNET_TYPE: | |
455 | if (buf[0] < sizeof(*(ctx->ether_desc))) | |
456 | break; | |
457 | ||
458 | ctx->ether_desc = | |
459 | (const struct usb_cdc_ether_desc *)buf; | |
900d495a AO |
460 | break; |
461 | ||
462 | case USB_CDC_NCM_TYPE: | |
463 | if (buf[0] < sizeof(*(ctx->func_desc))) | |
464 | break; | |
465 | ||
466 | ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; | |
467 | break; | |
468 | ||
38396e4c GS |
469 | case USB_CDC_MBIM_TYPE: |
470 | if (buf[0] < sizeof(*(ctx->mbim_desc))) | |
471 | break; | |
472 | ||
473 | ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; | |
474 | break; | |
475 | ||
259fef03 BC |
476 | case USB_CDC_MBIM_EXTENDED_TYPE: |
477 | if (buf[0] < sizeof(*(ctx->mbim_extended_desc))) | |
478 | break; | |
479 | ||
480 | ctx->mbim_extended_desc = | |
481 | (const struct usb_cdc_mbim_extended_desc *)buf; | |
482 | break; | |
483 | ||
900d495a AO |
484 | default: |
485 | break; | |
486 | } | |
487 | advance: | |
488 | /* advance to next descriptor */ | |
489 | temp = buf[0]; | |
490 | buf += temp; | |
491 | len -= temp; | |
492 | } | |
493 | ||
9992c2e2 | 494 | /* some buggy devices have an IAD but no CDC Union */ |
83292236 | 495 | if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { |
56a666dc BM |
496 | ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); |
497 | dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); | |
9992c2e2 BM |
498 | } |
499 | ||
900d495a | 500 | /* check if we got everything */ |
f8afb73d BM |
501 | if (!ctx->data) { |
502 | dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n"); | |
900d495a | 503 | goto error; |
296e81f8 | 504 | } |
f8afb73d BM |
505 | if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { |
506 | if (!ctx->mbim_desc) { | |
507 | dev_dbg(&intf->dev, "MBIM functional descriptor missing\n"); | |
508 | goto error; | |
509 | } | |
510 | } else { | |
511 | if (!ctx->ether_desc || !ctx->func_desc) { | |
512 | dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n"); | |
513 | goto error; | |
514 | } | |
515 | } | |
900d495a | 516 | |
bbc8d922 BM |
517 | /* claim data interface, if different from control */ |
518 | if (ctx->data != ctx->control) { | |
519 | temp = usb_driver_claim_interface(driver, ctx->data, dev); | |
296e81f8 BM |
520 | if (temp) { |
521 | dev_dbg(&intf->dev, "failed to claim data intf\n"); | |
bbc8d922 | 522 | goto error; |
296e81f8 | 523 | } |
bbc8d922 | 524 | } |
900d495a AO |
525 | |
526 | iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; | |
527 | ||
528 | /* reset data interface */ | |
529 | temp = usb_set_interface(dev->udev, iface_no, 0); | |
296e81f8 BM |
530 | if (temp) { |
531 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 532 | goto error2; |
296e81f8 | 533 | } |
900d495a | 534 | |
ff0992e9 BM |
535 | /* initialize data interface */ |
536 | if (cdc_ncm_setup(dev)) | |
537 | goto error2; | |
538 | ||
900d495a | 539 | /* configure data interface */ |
38396e4c | 540 | temp = usb_set_interface(dev->udev, iface_no, data_altsetting); |
296e81f8 BM |
541 | if (temp) { |
542 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 543 | goto error2; |
296e81f8 | 544 | } |
900d495a | 545 | |
ff1632aa BM |
546 | cdc_ncm_find_endpoints(dev, ctx->data); |
547 | cdc_ncm_find_endpoints(dev, ctx->control); | |
296e81f8 BM |
548 | if (!dev->in || !dev->out || !dev->status) { |
549 | dev_dbg(&intf->dev, "failed to collect endpoints\n"); | |
19694ac8 | 550 | goto error2; |
296e81f8 | 551 | } |
900d495a | 552 | |
900d495a AO |
553 | usb_set_intfdata(ctx->data, dev); |
554 | usb_set_intfdata(ctx->control, dev); | |
900d495a | 555 | |
38396e4c GS |
556 | if (ctx->ether_desc) { |
557 | temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); | |
296e81f8 BM |
558 | if (temp) { |
559 | dev_dbg(&intf->dev, "failed to get mac address\n"); | |
38396e4c | 560 | goto error2; |
296e81f8 BM |
561 | } |
562 | dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); | |
38396e4c | 563 | } |
900d495a | 564 | |
43c87f78 BM |
565 | /* usbnet use these values for sizing tx/rx queues */ |
566 | dev->hard_mtu = ctx->tx_max; | |
900d495a AO |
567 | dev->rx_urb_size = ctx->rx_max; |
568 | ||
ff0992e9 BM |
569 | /* cdc_ncm_setup will override dwNtbOutMaxSize if it is |
570 | * outside the sane range. Adding a pad byte here if necessary | |
571 | * simplifies the handling in cdc_ncm_fill_tx_frame, making | |
572 | * tx_max always represent the real skb max size. | |
573 | */ | |
574 | if (ctx->tx_max != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && | |
575 | ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0) | |
576 | ctx->tx_max++; | |
577 | ||
900d495a AO |
578 | return 0; |
579 | ||
19694ac8 AO |
580 | error2: |
581 | usb_set_intfdata(ctx->control, NULL); | |
582 | usb_set_intfdata(ctx->data, NULL); | |
6b4ef602 BM |
583 | if (ctx->data != ctx->control) |
584 | usb_driver_release_interface(driver, ctx->data); | |
900d495a AO |
585 | error: |
586 | cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); | |
587 | dev->data[0] = 0; | |
296e81f8 | 588 | dev_info(&intf->dev, "bind() failure\n"); |
900d495a AO |
589 | return -ENODEV; |
590 | } | |
c91ce3b6 | 591 | EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); |
900d495a | 592 | |
c91ce3b6 | 593 | void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) |
900d495a AO |
594 | { |
595 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
19694ac8 | 596 | struct usb_driver *driver = driver_of(intf); |
900d495a AO |
597 | |
598 | if (ctx == NULL) | |
599 | return; /* no setup */ | |
600 | ||
c84ff1d6 AO |
601 | atomic_set(&ctx->stop, 1); |
602 | ||
603 | if (hrtimer_active(&ctx->tx_timer)) | |
604 | hrtimer_cancel(&ctx->tx_timer); | |
605 | ||
606 | tasklet_kill(&ctx->bh); | |
607 | ||
bbc8d922 BM |
608 | /* handle devices with combined control and data interface */ |
609 | if (ctx->control == ctx->data) | |
610 | ctx->data = NULL; | |
611 | ||
19694ac8 AO |
612 | /* disconnect master --> disconnect slave */ |
613 | if (intf == ctx->control && ctx->data) { | |
614 | usb_set_intfdata(ctx->data, NULL); | |
900d495a | 615 | usb_driver_release_interface(driver, ctx->data); |
19694ac8 | 616 | ctx->data = NULL; |
900d495a | 617 | |
19694ac8 AO |
618 | } else if (intf == ctx->data && ctx->control) { |
619 | usb_set_intfdata(ctx->control, NULL); | |
900d495a | 620 | usb_driver_release_interface(driver, ctx->control); |
19694ac8 | 621 | ctx->control = NULL; |
900d495a AO |
622 | } |
623 | ||
3e515665 | 624 | usb_set_intfdata(intf, NULL); |
900d495a AO |
625 | cdc_ncm_free(ctx); |
626 | } | |
c91ce3b6 | 627 | EXPORT_SYMBOL_GPL(cdc_ncm_unbind); |
900d495a | 628 | |
50a0ffaf BM |
629 | /* Return the number of the MBIM control interface altsetting iff it |
630 | * is preferred and available, | |
1e8bbe6c | 631 | */ |
50a0ffaf | 632 | u8 cdc_ncm_select_altsetting(struct usb_interface *intf) |
38396e4c | 633 | { |
1e8bbe6c | 634 | struct usb_host_interface *alt; |
38396e4c | 635 | |
bd329e12 BM |
636 | /* The MBIM spec defines a NCM compatible default altsetting, |
637 | * which we may have matched: | |
638 | * | |
639 | * "Functions that implement both NCM 1.0 and MBIM (an | |
640 | * “NCM/MBIM function”) according to this recommendation | |
641 | * shall provide two alternate settings for the | |
642 | * Communication Interface. Alternate setting 0, and the | |
643 | * associated class and endpoint descriptors, shall be | |
644 | * constructed according to the rules given for the | |
645 | * Communication Interface in section 5 of [USBNCM10]. | |
646 | * Alternate setting 1, and the associated class and | |
647 | * endpoint descriptors, shall be constructed according to | |
648 | * the rules given in section 6 (USB Device Model) of this | |
649 | * specification." | |
bd329e12 | 650 | */ |
50a0ffaf BM |
651 | if (intf->num_altsetting < 2) |
652 | return intf->cur_altsetting->desc.bAlternateSetting; | |
653 | ||
654 | if (prefer_mbim) { | |
1e8bbe6c | 655 | alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); |
50a0ffaf BM |
656 | if (alt && cdc_ncm_comm_intf_is_mbim(alt)) |
657 | return CDC_NCM_COMM_ALTSETTING_MBIM; | |
f350ca03 | 658 | } |
50a0ffaf | 659 | return CDC_NCM_COMM_ALTSETTING_NCM; |
1e8bbe6c BM |
660 | } |
661 | EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); | |
662 | ||
663 | static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) | |
664 | { | |
665 | int ret; | |
666 | ||
667 | /* MBIM backwards compatible function? */ | |
50a0ffaf | 668 | if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) |
1e8bbe6c | 669 | return -ENODEV; |
bd329e12 | 670 | |
50a0ffaf BM |
671 | /* The NCM data altsetting is fixed */ |
672 | ret = cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM); | |
38396e4c GS |
673 | |
674 | /* | |
675 | * We should get an event when network connection is "connected" or | |
676 | * "disconnected". Set network connection in "disconnected" state | |
677 | * (carrier is OFF) during attach, so the IP network stack does not | |
678 | * start IPv6 negotiation and more. | |
679 | */ | |
8a34b0ae | 680 | usbnet_link_change(dev, 0, 0); |
38396e4c GS |
681 | return ret; |
682 | } | |
683 | ||
c78b7c58 | 684 | static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) |
900d495a | 685 | { |
c78b7c58 BM |
686 | size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; |
687 | ||
688 | if (skb->len + align > max) | |
689 | align = max - skb->len; | |
690 | if (align && skb_tailroom(skb) >= align) | |
691 | memset(skb_put(skb, align), 0, align); | |
692 | } | |
693 | ||
694 | /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly | |
695 | * allocating a new one within skb | |
696 | */ | |
697 | static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) | |
698 | { | |
699 | struct usb_cdc_ncm_ndp16 *ndp16 = NULL; | |
700 | struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; | |
701 | size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); | |
702 | ||
703 | /* follow the chain of NDPs, looking for a match */ | |
704 | while (ndpoffset) { | |
705 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); | |
706 | if (ndp16->dwSignature == sign) | |
707 | return ndp16; | |
708 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
709 | } | |
710 | ||
711 | /* align new NDP */ | |
712 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); | |
713 | ||
714 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
715 | if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) | |
716 | return NULL; | |
717 | ||
718 | /* link to it */ | |
719 | if (ndp16) | |
720 | ndp16->wNextNdpIndex = cpu_to_le16(skb->len); | |
721 | else | |
722 | nth16->wNdpIndex = cpu_to_le16(skb->len); | |
723 | ||
724 | /* push a new empty NDP */ | |
725 | ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); | |
726 | ndp16->dwSignature = sign; | |
727 | ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); | |
728 | return ndp16; | |
900d495a AO |
729 | } |
730 | ||
c91ce3b6 | 731 | struct sk_buff * |
bed6f762 | 732 | cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) |
900d495a | 733 | { |
bed6f762 | 734 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
c78b7c58 BM |
735 | struct usb_cdc_ncm_nth16 *nth16; |
736 | struct usb_cdc_ncm_ndp16 *ndp16; | |
900d495a | 737 | struct sk_buff *skb_out; |
c78b7c58 | 738 | u16 n = 0, index, ndplen; |
84e77a8b | 739 | u8 ready2send = 0; |
900d495a AO |
740 | |
741 | /* if there is a remaining skb, it gets priority */ | |
c78b7c58 | 742 | if (skb != NULL) { |
900d495a | 743 | swap(skb, ctx->tx_rem_skb); |
c78b7c58 BM |
744 | swap(sign, ctx->tx_rem_sign); |
745 | } else { | |
84e77a8b | 746 | ready2send = 1; |
c78b7c58 | 747 | } |
900d495a AO |
748 | |
749 | /* check if we are resuming an OUT skb */ | |
c78b7c58 | 750 | skb_out = ctx->tx_curr_skb; |
900d495a | 751 | |
c78b7c58 BM |
752 | /* allocate a new OUT skb */ |
753 | if (!skb_out) { | |
20572226 | 754 | skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); |
900d495a AO |
755 | if (skb_out == NULL) { |
756 | if (skb != NULL) { | |
757 | dev_kfree_skb_any(skb); | |
bed6f762 | 758 | dev->net->stats.tx_dropped++; |
900d495a AO |
759 | } |
760 | goto exit_no_skb; | |
761 | } | |
c78b7c58 BM |
762 | /* fill out the initial 16-bit NTB header */ |
763 | nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); | |
764 | nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); | |
765 | nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); | |
766 | nth16->wSequence = cpu_to_le16(ctx->tx_seq++); | |
900d495a | 767 | |
c78b7c58 | 768 | /* count total number of frames in this NTB */ |
900d495a AO |
769 | ctx->tx_curr_frame_num = 0; |
770 | } | |
771 | ||
c78b7c58 BM |
772 | for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { |
773 | /* send any remaining skb first */ | |
900d495a AO |
774 | if (skb == NULL) { |
775 | skb = ctx->tx_rem_skb; | |
c78b7c58 | 776 | sign = ctx->tx_rem_sign; |
900d495a AO |
777 | ctx->tx_rem_skb = NULL; |
778 | ||
779 | /* check for end of skb */ | |
780 | if (skb == NULL) | |
781 | break; | |
782 | } | |
783 | ||
c78b7c58 BM |
784 | /* get the appropriate NDP for this skb */ |
785 | ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
786 | ||
787 | /* align beginning of next frame */ | |
788 | cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); | |
789 | ||
790 | /* check if we had enough room left for both NDP and frame */ | |
791 | if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { | |
900d495a AO |
792 | if (n == 0) { |
793 | /* won't fit, MTU problem? */ | |
794 | dev_kfree_skb_any(skb); | |
795 | skb = NULL; | |
bed6f762 | 796 | dev->net->stats.tx_dropped++; |
900d495a AO |
797 | } else { |
798 | /* no room for skb - store for later */ | |
799 | if (ctx->tx_rem_skb != NULL) { | |
800 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
bed6f762 | 801 | dev->net->stats.tx_dropped++; |
900d495a AO |
802 | } |
803 | ctx->tx_rem_skb = skb; | |
c78b7c58 | 804 | ctx->tx_rem_sign = sign; |
900d495a | 805 | skb = NULL; |
84e77a8b | 806 | ready2send = 1; |
900d495a AO |
807 | } |
808 | break; | |
809 | } | |
810 | ||
c78b7c58 BM |
811 | /* calculate frame number withing this NDP */ |
812 | ndplen = le16_to_cpu(ndp16->wLength); | |
813 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; | |
900d495a | 814 | |
c78b7c58 BM |
815 | /* OK, add this skb */ |
816 | ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); | |
817 | ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); | |
818 | ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); | |
819 | memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); | |
900d495a AO |
820 | dev_kfree_skb_any(skb); |
821 | skb = NULL; | |
c78b7c58 BM |
822 | |
823 | /* send now if this NDP is full */ | |
824 | if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { | |
825 | ready2send = 1; | |
826 | break; | |
827 | } | |
900d495a AO |
828 | } |
829 | ||
830 | /* free up any dangling skb */ | |
831 | if (skb != NULL) { | |
832 | dev_kfree_skb_any(skb); | |
833 | skb = NULL; | |
bed6f762 | 834 | dev->net->stats.tx_dropped++; |
900d495a AO |
835 | } |
836 | ||
837 | ctx->tx_curr_frame_num = n; | |
838 | ||
839 | if (n == 0) { | |
840 | /* wait for more frames */ | |
841 | /* push variables */ | |
842 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
843 | goto exit_no_skb; |
844 | ||
84e77a8b | 845 | } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { |
900d495a AO |
846 | /* wait for more frames */ |
847 | /* push variables */ | |
848 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
849 | /* set the pending count */ |
850 | if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) | |
c84ff1d6 | 851 | ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; |
900d495a AO |
852 | goto exit_no_skb; |
853 | ||
854 | } else { | |
855 | /* frame goes out */ | |
856 | /* variables will be reset at next call */ | |
857 | } | |
858 | ||
20572226 BM |
859 | /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT |
860 | * bytes, we send buffers as it is. If we get more data, it | |
861 | * would be more efficient for USB HS mobile device with DMA | |
862 | * engine to receive a full size NTB, than canceling DMA | |
863 | * transfer and receiving a short packet. | |
4d619f62 BM |
864 | * |
865 | * This optimization support is pointless if we end up sending | |
866 | * a ZLP after full sized NTBs. | |
900d495a | 867 | */ |
4d619f62 BM |
868 | if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && |
869 | skb_out->len > CDC_NCM_MIN_TX_PKT) | |
20572226 BM |
870 | memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, |
871 | ctx->tx_max - skb_out->len); | |
9becd707 | 872 | else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0) |
c78b7c58 | 873 | *skb_put(skb_out, 1) = 0; /* force short packet */ |
900d495a | 874 | |
c78b7c58 BM |
875 | /* set final frame length */ |
876 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
877 | nth16->wBlockLength = cpu_to_le16(skb_out->len); | |
900d495a AO |
878 | |
879 | /* return skb */ | |
880 | ctx->tx_curr_skb = NULL; | |
bed6f762 | 881 | dev->net->stats.tx_packets += ctx->tx_curr_frame_num; |
900d495a AO |
882 | return skb_out; |
883 | ||
884 | exit_no_skb: | |
c84ff1d6 AO |
885 | /* Start timer, if there is a remaining skb */ |
886 | if (ctx->tx_curr_skb != NULL) | |
887 | cdc_ncm_tx_timeout_start(ctx); | |
900d495a AO |
888 | return NULL; |
889 | } | |
c91ce3b6 | 890 | EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); |
900d495a AO |
891 | |
892 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) | |
893 | { | |
894 | /* start timer, if not already started */ | |
c84ff1d6 AO |
895 | if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) |
896 | hrtimer_start(&ctx->tx_timer, | |
897 | ktime_set(0, CDC_NCM_TIMER_INTERVAL), | |
898 | HRTIMER_MODE_REL); | |
900d495a AO |
899 | } |
900 | ||
c84ff1d6 | 901 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) |
900d495a | 902 | { |
c84ff1d6 AO |
903 | struct cdc_ncm_ctx *ctx = |
904 | container_of(timer, struct cdc_ncm_ctx, tx_timer); | |
900d495a | 905 | |
c84ff1d6 AO |
906 | if (!atomic_read(&ctx->stop)) |
907 | tasklet_schedule(&ctx->bh); | |
908 | return HRTIMER_NORESTART; | |
909 | } | |
900d495a | 910 | |
c84ff1d6 AO |
911 | static void cdc_ncm_txpath_bh(unsigned long param) |
912 | { | |
bed6f762 BM |
913 | struct usbnet *dev = (struct usbnet *)param; |
914 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a | 915 | |
c84ff1d6 AO |
916 | spin_lock_bh(&ctx->mtx); |
917 | if (ctx->tx_timer_pending != 0) { | |
918 | ctx->tx_timer_pending--; | |
900d495a | 919 | cdc_ncm_tx_timeout_start(ctx); |
c84ff1d6 | 920 | spin_unlock_bh(&ctx->mtx); |
bed6f762 | 921 | } else if (dev->net != NULL) { |
c84ff1d6 | 922 | spin_unlock_bh(&ctx->mtx); |
bed6f762 BM |
923 | netif_tx_lock_bh(dev->net); |
924 | usbnet_start_xmit(NULL, dev->net); | |
925 | netif_tx_unlock_bh(dev->net); | |
7b1e0cba BM |
926 | } else { |
927 | spin_unlock_bh(&ctx->mtx); | |
f742aa8a | 928 | } |
900d495a AO |
929 | } |
930 | ||
2f69702c | 931 | struct sk_buff * |
900d495a AO |
932 | cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
933 | { | |
934 | struct sk_buff *skb_out; | |
935 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a AO |
936 | |
937 | /* | |
938 | * The Ethernet API we are using does not support transmitting | |
939 | * multiple Ethernet frames in a single call. This driver will | |
940 | * accumulate multiple Ethernet frames and send out a larger | |
941 | * USB frame when the USB buffer is full or when a single jiffies | |
942 | * timeout happens. | |
943 | */ | |
944 | if (ctx == NULL) | |
945 | goto error; | |
946 | ||
c84ff1d6 | 947 | spin_lock_bh(&ctx->mtx); |
bed6f762 | 948 | skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); |
c84ff1d6 | 949 | spin_unlock_bh(&ctx->mtx); |
900d495a AO |
950 | return skb_out; |
951 | ||
952 | error: | |
953 | if (skb != NULL) | |
954 | dev_kfree_skb_any(skb); | |
955 | ||
956 | return NULL; | |
957 | } | |
2f69702c | 958 | EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); |
900d495a | 959 | |
ff06ab13 | 960 | /* verify NTB header and return offset of first NDP, or negative error */ |
c91ce3b6 | 961 | int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
900d495a | 962 | { |
ae223cd4 | 963 | struct usbnet *dev = netdev_priv(skb_in->dev); |
d5ddb4a5 | 964 | struct usb_cdc_ncm_nth16 *nth16; |
ff06ab13 BM |
965 | int len; |
966 | int ret = -EINVAL; | |
900d495a | 967 | |
900d495a AO |
968 | if (ctx == NULL) |
969 | goto error; | |
970 | ||
d5ddb4a5 AO |
971 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + |
972 | sizeof(struct usb_cdc_ncm_ndp16))) { | |
ae223cd4 | 973 | netif_dbg(dev, rx_err, dev->net, "frame too short\n"); |
900d495a AO |
974 | goto error; |
975 | } | |
976 | ||
d5ddb4a5 | 977 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; |
900d495a | 978 | |
986e10d6 | 979 | if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { |
5448d75f BM |
980 | netif_dbg(dev, rx_err, dev->net, |
981 | "invalid NTH16 signature <%#010x>\n", | |
982 | le32_to_cpu(nth16->dwSignature)); | |
900d495a AO |
983 | goto error; |
984 | } | |
985 | ||
d5ddb4a5 AO |
986 | len = le16_to_cpu(nth16->wBlockLength); |
987 | if (len > ctx->rx_max) { | |
ae223cd4 BM |
988 | netif_dbg(dev, rx_err, dev->net, |
989 | "unsupported NTB block length %u/%u\n", len, | |
990 | ctx->rx_max); | |
900d495a AO |
991 | goto error; |
992 | } | |
993 | ||
d5ddb4a5 | 994 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && |
ae223cd4 BM |
995 | (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && |
996 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { | |
997 | netif_dbg(dev, rx_err, dev->net, | |
998 | "sequence number glitch prev=%d curr=%d\n", | |
999 | ctx->rx_seq, le16_to_cpu(nth16->wSequence)); | |
d5ddb4a5 AO |
1000 | } |
1001 | ctx->rx_seq = le16_to_cpu(nth16->wSequence); | |
1002 | ||
ff06ab13 BM |
1003 | ret = le16_to_cpu(nth16->wNdpIndex); |
1004 | error: | |
1005 | return ret; | |
1006 | } | |
c91ce3b6 | 1007 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); |
ff06ab13 BM |
1008 | |
1009 | /* verify NDP header and return number of datagrams, or negative error */ | |
c91ce3b6 | 1010 | int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) |
ff06ab13 | 1011 | { |
ae223cd4 | 1012 | struct usbnet *dev = netdev_priv(skb_in->dev); |
ff06ab13 BM |
1013 | struct usb_cdc_ncm_ndp16 *ndp16; |
1014 | int ret = -EINVAL; | |
1015 | ||
75d67d35 | 1016 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { |
ae223cd4 BM |
1017 | netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", |
1018 | ndpoffset); | |
900d495a AO |
1019 | goto error; |
1020 | } | |
75d67d35 | 1021 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
900d495a | 1022 | |
d5ddb4a5 | 1023 | if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { |
ae223cd4 BM |
1024 | netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", |
1025 | le16_to_cpu(ndp16->wLength)); | |
ff06ab13 | 1026 | goto error; |
900d495a AO |
1027 | } |
1028 | ||
ff06ab13 | 1029 | ret = ((le16_to_cpu(ndp16->wLength) - |
900d495a AO |
1030 | sizeof(struct usb_cdc_ncm_ndp16)) / |
1031 | sizeof(struct usb_cdc_ncm_dpe16)); | |
ff06ab13 | 1032 | ret--; /* we process NDP entries except for the last one */ |
900d495a | 1033 | |
ae223cd4 BM |
1034 | if ((sizeof(struct usb_cdc_ncm_ndp16) + |
1035 | ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { | |
1036 | netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); | |
ff06ab13 | 1037 | ret = -EINVAL; |
900d495a AO |
1038 | } |
1039 | ||
ff06ab13 BM |
1040 | error: |
1041 | return ret; | |
1042 | } | |
c91ce3b6 | 1043 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); |
ff06ab13 | 1044 | |
2f69702c | 1045 | int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) |
ff06ab13 BM |
1046 | { |
1047 | struct sk_buff *skb; | |
1048 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1049 | int len; | |
1050 | int nframes; | |
1051 | int x; | |
1052 | int offset; | |
1053 | struct usb_cdc_ncm_ndp16 *ndp16; | |
1054 | struct usb_cdc_ncm_dpe16 *dpe16; | |
1055 | int ndpoffset; | |
1056 | int loopcount = 50; /* arbitrary max preventing infinite loop */ | |
1057 | ||
1058 | ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); | |
1059 | if (ndpoffset < 0) | |
1060 | goto error; | |
1061 | ||
1062 | next_ndp: | |
1063 | nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); | |
1064 | if (nframes < 0) | |
1065 | goto error; | |
1066 | ||
1067 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); | |
1068 | ||
986e10d6 | 1069 | if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { |
5448d75f BM |
1070 | netif_dbg(dev, rx_err, dev->net, |
1071 | "invalid DPT16 signature <%#010x>\n", | |
1072 | le32_to_cpu(ndp16->dwSignature)); | |
ff06ab13 BM |
1073 | goto err_ndp; |
1074 | } | |
1075 | dpe16 = ndp16->dpe16; | |
900d495a | 1076 | |
d5ddb4a5 AO |
1077 | for (x = 0; x < nframes; x++, dpe16++) { |
1078 | offset = le16_to_cpu(dpe16->wDatagramIndex); | |
1079 | len = le16_to_cpu(dpe16->wDatagramLength); | |
900d495a AO |
1080 | |
1081 | /* | |
1082 | * CDC NCM ch. 3.7 | |
1083 | * All entries after first NULL entry are to be ignored | |
1084 | */ | |
d5ddb4a5 | 1085 | if ((offset == 0) || (len == 0)) { |
900d495a | 1086 | if (!x) |
75d67d35 | 1087 | goto err_ndp; /* empty NTB */ |
900d495a AO |
1088 | break; |
1089 | } | |
1090 | ||
1091 | /* sanity checking */ | |
d5ddb4a5 AO |
1092 | if (((offset + len) > skb_in->len) || |
1093 | (len > ctx->rx_max) || (len < ETH_HLEN)) { | |
ae223cd4 BM |
1094 | netif_dbg(dev, rx_err, dev->net, |
1095 | "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", | |
1096 | x, offset, len, skb_in); | |
900d495a | 1097 | if (!x) |
75d67d35 | 1098 | goto err_ndp; |
900d495a AO |
1099 | break; |
1100 | ||
1101 | } else { | |
1102 | skb = skb_clone(skb_in, GFP_ATOMIC); | |
9e56790a JJ |
1103 | if (!skb) |
1104 | goto error; | |
d5ddb4a5 | 1105 | skb->len = len; |
900d495a | 1106 | skb->data = ((u8 *)skb_in->data) + offset; |
d5ddb4a5 | 1107 | skb_set_tail_pointer(skb, len); |
900d495a AO |
1108 | usbnet_skb_return(dev, skb); |
1109 | } | |
1110 | } | |
75d67d35 BM |
1111 | err_ndp: |
1112 | /* are there more NDPs to process? */ | |
1113 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1114 | if (ndpoffset && loopcount--) | |
1115 | goto next_ndp; | |
1116 | ||
900d495a AO |
1117 | return 1; |
1118 | error: | |
1119 | return 0; | |
1120 | } | |
2f69702c | 1121 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); |
900d495a AO |
1122 | |
1123 | static void | |
bed6f762 | 1124 | cdc_ncm_speed_change(struct usbnet *dev, |
84e77a8b | 1125 | struct usb_cdc_speed_change *data) |
900d495a | 1126 | { |
84e77a8b AO |
1127 | uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); |
1128 | uint32_t tx_speed = le32_to_cpu(data->ULBitRate); | |
900d495a AO |
1129 | |
1130 | /* | |
1131 | * Currently the USB-NET API does not support reporting the actual | |
1132 | * device speed. Do print it instead. | |
1133 | */ | |
f3028c52 | 1134 | if ((tx_speed > 1000000) && (rx_speed > 1000000)) { |
ae223cd4 BM |
1135 | netif_info(dev, link, dev->net, |
1136 | "%u mbit/s downlink %u mbit/s uplink\n", | |
f3028c52 BM |
1137 | (unsigned int)(rx_speed / 1000000U), |
1138 | (unsigned int)(tx_speed / 1000000U)); | |
1139 | } else { | |
ae223cd4 BM |
1140 | netif_info(dev, link, dev->net, |
1141 | "%u kbit/s downlink %u kbit/s uplink\n", | |
f3028c52 BM |
1142 | (unsigned int)(rx_speed / 1000U), |
1143 | (unsigned int)(tx_speed / 1000U)); | |
900d495a AO |
1144 | } |
1145 | } | |
1146 | ||
1147 | static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) | |
1148 | { | |
1149 | struct cdc_ncm_ctx *ctx; | |
1150 | struct usb_cdc_notification *event; | |
1151 | ||
1152 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1153 | ||
1154 | if (urb->actual_length < sizeof(*event)) | |
1155 | return; | |
1156 | ||
1157 | /* test for split data in 8-byte chunks */ | |
1158 | if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { | |
bed6f762 | 1159 | cdc_ncm_speed_change(dev, |
84e77a8b | 1160 | (struct usb_cdc_speed_change *)urb->transfer_buffer); |
900d495a AO |
1161 | return; |
1162 | } | |
1163 | ||
1164 | event = urb->transfer_buffer; | |
1165 | ||
1166 | switch (event->bNotificationType) { | |
1167 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
1168 | /* | |
1169 | * According to the CDC NCM specification ch.7.1 | |
1170 | * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be | |
1171 | * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. | |
1172 | */ | |
1a7c6cc6 | 1173 | ctx->connected = le16_to_cpu(event->wValue); |
ae223cd4 BM |
1174 | netif_info(dev, link, dev->net, |
1175 | "network connection: %sconnected\n", | |
1176 | ctx->connected ? "" : "dis"); | |
8a34b0ae | 1177 | usbnet_link_change(dev, ctx->connected, 0); |
900d495a AO |
1178 | break; |
1179 | ||
1180 | case USB_CDC_NOTIFY_SPEED_CHANGE: | |
84e77a8b AO |
1181 | if (urb->actual_length < (sizeof(*event) + |
1182 | sizeof(struct usb_cdc_speed_change))) | |
900d495a AO |
1183 | set_bit(EVENT_STS_SPLIT, &dev->flags); |
1184 | else | |
bed6f762 BM |
1185 | cdc_ncm_speed_change(dev, |
1186 | (struct usb_cdc_speed_change *)&event[1]); | |
900d495a AO |
1187 | break; |
1188 | ||
1189 | default: | |
67a36606 BM |
1190 | dev_dbg(&dev->udev->dev, |
1191 | "NCM: unexpected notification 0x%02x!\n", | |
1192 | event->bNotificationType); | |
900d495a AO |
1193 | break; |
1194 | } | |
1195 | } | |
1196 | ||
1197 | static int cdc_ncm_check_connect(struct usbnet *dev) | |
1198 | { | |
1199 | struct cdc_ncm_ctx *ctx; | |
1200 | ||
1201 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1202 | if (ctx == NULL) | |
1203 | return 1; /* disconnected */ | |
1204 | ||
1205 | return !ctx->connected; | |
1206 | } | |
1207 | ||
900d495a AO |
1208 | static const struct driver_info cdc_ncm_info = { |
1209 | .description = "CDC NCM", | |
c261344d | 1210 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, |
900d495a AO |
1211 | .bind = cdc_ncm_bind, |
1212 | .unbind = cdc_ncm_unbind, | |
1213 | .check_connect = cdc_ncm_check_connect, | |
a5e40708 | 1214 | .manage_power = usbnet_manage_power, |
900d495a AO |
1215 | .status = cdc_ncm_status, |
1216 | .rx_fixup = cdc_ncm_rx_fixup, | |
1217 | .tx_fixup = cdc_ncm_tx_fixup, | |
1218 | }; | |
1219 | ||
f94898ea DW |
1220 | /* Same as cdc_ncm_info, but with FLAG_WWAN */ |
1221 | static const struct driver_info wwan_info = { | |
1222 | .description = "Mobile Broadband Network Device", | |
1223 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
1224 | | FLAG_WWAN, | |
1225 | .bind = cdc_ncm_bind, | |
1226 | .unbind = cdc_ncm_unbind, | |
1227 | .check_connect = cdc_ncm_check_connect, | |
a5e40708 | 1228 | .manage_power = usbnet_manage_power, |
f94898ea DW |
1229 | .status = cdc_ncm_status, |
1230 | .rx_fixup = cdc_ncm_rx_fixup, | |
1231 | .tx_fixup = cdc_ncm_tx_fixup, | |
1232 | }; | |
1233 | ||
2f62d5aa WS |
1234 | /* Same as wwan_info, but with FLAG_NOARP */ |
1235 | static const struct driver_info wwan_noarp_info = { | |
1236 | .description = "Mobile Broadband Network Device (NO ARP)", | |
1237 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
1238 | | FLAG_WWAN | FLAG_NOARP, | |
1239 | .bind = cdc_ncm_bind, | |
1240 | .unbind = cdc_ncm_unbind, | |
1241 | .check_connect = cdc_ncm_check_connect, | |
1242 | .manage_power = usbnet_manage_power, | |
1243 | .status = cdc_ncm_status, | |
1244 | .rx_fixup = cdc_ncm_rx_fixup, | |
1245 | .tx_fixup = cdc_ncm_tx_fixup, | |
1246 | }; | |
1247 | ||
f94898ea DW |
1248 | static const struct usb_device_id cdc_devs[] = { |
1249 | /* Ericsson MBM devices like F5521gw */ | |
1250 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1251 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1252 | .idVendor = 0x0bdb, | |
1253 | .bInterfaceClass = USB_CLASS_COMM, | |
1254 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1255 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1256 | .driver_info = (unsigned long) &wwan_info, | |
1257 | }, | |
1258 | ||
f3a1ef9c PM |
1259 | /* Dell branded MBM devices like DW5550 */ |
1260 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1261 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1262 | .idVendor = 0x413c, | |
1263 | .bInterfaceClass = USB_CLASS_COMM, | |
1264 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1265 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1266 | .driver_info = (unsigned long) &wwan_info, | |
1267 | }, | |
1268 | ||
1269 | /* Toshiba branded MBM devices */ | |
1270 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1271 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1272 | .idVendor = 0x0930, | |
1273 | .bInterfaceClass = USB_CLASS_COMM, | |
1274 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1275 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1276 | .driver_info = (unsigned long) &wwan_info, | |
1277 | }, | |
1278 | ||
1f84eab4 BM |
1279 | /* tag Huawei devices as wwan */ |
1280 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, | |
1281 | USB_CLASS_COMM, | |
1282 | USB_CDC_SUBCLASS_NCM, | |
1283 | USB_CDC_PROTO_NONE), | |
1284 | .driver_info = (unsigned long)&wwan_info, | |
1285 | }, | |
1286 | ||
2f62d5aa WS |
1287 | /* Infineon(now Intel) HSPA Modem platform */ |
1288 | { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, | |
1289 | USB_CLASS_COMM, | |
1290 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1291 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1292 | }, | |
1293 | ||
f94898ea DW |
1294 | /* Generic CDC-NCM devices */ |
1295 | { USB_INTERFACE_INFO(USB_CLASS_COMM, | |
1296 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1297 | .driver_info = (unsigned long)&cdc_ncm_info, | |
1298 | }, | |
1299 | { | |
1300 | }, | |
1301 | }; | |
1302 | MODULE_DEVICE_TABLE(usb, cdc_devs); | |
1303 | ||
900d495a AO |
1304 | static struct usb_driver cdc_ncm_driver = { |
1305 | .name = "cdc_ncm", | |
1306 | .id_table = cdc_devs, | |
085e50e1 BM |
1307 | .probe = usbnet_probe, |
1308 | .disconnect = usbnet_disconnect, | |
900d495a AO |
1309 | .suspend = usbnet_suspend, |
1310 | .resume = usbnet_resume, | |
85e3c65f | 1311 | .reset_resume = usbnet_resume, |
900d495a | 1312 | .supports_autosuspend = 1, |
e1f12eb6 | 1313 | .disable_hub_initiated_lpm = 1, |
900d495a AO |
1314 | }; |
1315 | ||
d632eb1b | 1316 | module_usb_driver(cdc_ncm_driver); |
900d495a AO |
1317 | |
1318 | MODULE_AUTHOR("Hans Petter Selasky"); | |
1319 | MODULE_DESCRIPTION("USB CDC NCM host driver"); | |
1320 | MODULE_LICENSE("Dual BSD/GPL"); |